Method and means for making tight rolls



Jan. 11, 1933. P. D. PARSONS 1,894,281

METHOD AND MEANS FOR MAKING TIGHT ROLLS Filed May 15. 1930 2 Sheets-Sheet 1 Mfforn ey,

2 Sheets-Sheet 2 P. D. PARSONS Filed May4 15. 1930 lnvenor. Phi/n D. Pansa/1s,

METHOD AND MEANS FOR MAKING TIGHT ROLLS Jan. 17, 1933.

Patented Jan. 17, 1933 UNrrrD STATESPATENT Prior.g A

PHILIP D. PARSONS', OP SWARTHMORR, PnivivsYLvANI-aAssioNoR To COMPANY, A CORPORATION or PENNSYLVANIA IlVHilIiHODk AND MEANS FOB- MAKING TIGHT ROLLS Application filed May 15,

In the manufacture of paper rolls and more particularly that class of -rolls known as toilet paper, the paper web is wound upon a tubular core under a tension such, that lwhen the rolls are removed from the winding inandrel, they ylack firmness; and, as a result, if

Vvtightly. packed lin cartons, they lose their cylindrical form, and in many cases are so distorted as to beunsa-tisfactory asa saleable article. y Y I v y Moreover, in those forms of vpaper known as creped paper, theteXture is quite soft andpliable and very materially increases the loosenessin the wound roll and consequently in papers of this character, the looseness of the roll is still more objectionable than the looseness existing in the rolls of those papers whichhave a relatively continuous` smooth surface. e f

The object of my invention is to-provide a means for causing the slit and perforated paper Webs to be wound upon the mandrel under a sufficient degreeV of tension andl under -conditions which cause the web to tightly position itself,'one layer upon the nent throughf out the formation of the roll, so thattheconvolutionsl of the paper from the' core to the perimeter `is of substantially uniform tensiony and compactness, with the result that `the rolls "are cylindrical and firm yso as to avoid becoming distorted underl any ordinary conditions, whether the paper webis of .a smooth or. creped character. f

My object is further to enable the paper web to be tightly woundinto roll' form at a -relatively high velocity (such for example as 1400 ft. or more per minute) with the result that not only is the vtime consumption'in the manufacture of the rolls greatly reduced over the capacity of the winding machines heretofore in use for making'toilet paper rolls (having capacity ,for winding 300 jft. per minute) but in addition thereto my invention enables 4a rolll of given 'diameter 'to contain a relatively greater number of connected sheets (so-called). Furthermore, in the case of theV soft creped papers, the greater tension, under which they are wound'by my improvements,ienablesl a roll'of a givendiam'eter to containr many more 'sheets' (so-called) as com- 1930. Serial No. 452,793.

pared to what has been possible in forming My invention consists of la roll making machine having means for'feeding the web of paper at a substantially uniform speed and also having a winding mandrel supported in relatively iixedbearings and driven at a variable speed inversely proportional to the increasing diameter of the roll While being formed thereon, combined with a roll tightening device comprising a frictionally driven pressure roll suspended so as to bemovable by pressure contact with the perimeter of the paper roll during its formation, in such manner that immediately after the web has taken form upon the mandrel, it is acted upon by the pressure roll in such a manner as to apply a stretching tension upon the web already re'- ceived upon themandrel or more particular- 1y, upon-that portion of the same between the pressure roll and wherethe web is tangential the perimeter of the .paper roll being wound' upon the Amandrel and free to change its surface 'speed of rotation proportionately with the increasing diameter of the paper roll during its-formation upon the mandrel, and preferably under such conditions as to increase its pressure vupon the' perimeter ofthe roll yin agradual manner commensurate increasing diameter thereof.

wah the My invention also comprehends other features of improvement which together with those above enumerated, are fully described hereinafter and particularly pointed out in 'the claims. Referring to the drawings, Fig. l is a side velevation of a roll making a machine embodying my improvements; Fig. 2 is a front view of the same; Fig. 3` is an enlarged vertical sectionavlview of a portion of the winding devices taken on line 3 3 of Fig. 2; and Fig. 4 is an enlarged view of a portion of Fig. 2 of the means for frictionally driving the mandrel and shown partly in section.

2 is the vmain frame of 'the machine and scorer PAPER n guide rod12 and iinally received uponf'the mandrel 13 upon Which it is Wound in roll form.

As shown in Fig'. 2, the main Webvis'subdivided longitudinally into a large number of narrow Webs by means of the plurality of lslitting cutters 11 and it Will alsobe noted .that the transversely perforated cutter 9 and 'drum 8 provides .transverse perforations at spaced intervals along the length of thevvebs. The `general construction ofthe perforating and slitting devices thus referred to are Amore or less common to machines of that class and therefore, While 1 haveillustrated-these particular features for performing the vfunctions of slitting),` and perforating, I kdo not ylimit or restrict my invention to their special. use as of providing the perforated Webs, may be .employed in lieu thereof.

As a vfurther detail of such mechanismsjl would point outthat the perforating cutter 9 and cooperating drum 8, as Well .'asthe slittingcutters .11, are all geared together -at 14 to insure their .proper cooperation. v15 is an electric motor for .imparting motive povver to the machine through thebelt'transmission 16 eXtendingtothe-shaft 17 of the drum 3.

Referring novv `more particularly to 'the features of construction shown in Figs. 3 and l and. their embodiment inthe machineshovvn .generally in Figs. 1and2, the following par- `ticular features are to be noted: the mandrel 13 is .preferably va bar of-substantially-square crossV section and having. a squarci extensionl-S at one end and a cylindrical journal 19 at the. other end., thela-tter detachably .received in a bearing 20. rlhe squareend 18 of the mandrel 1s driven by the mechanism more .particularly shown Yin'lig. l andconsisting of the Afollowing` parts: a-stationary 'bearing 21 provides at 22and 23 a ball-.bearingsupport for a central-shaft 24, oneendof which provides a socket 25 in'vvhich yis receiveda bushing` 26 having a square hole 27 in iWhich ,is` received the square extension oftheman` drelf13 and by Whichvit is rotated. Thebushing26 isreplaceable but When fitted into the socket of the shaft 24,fis pinnedather'ein asfat'28so as'tobe positively rotated vvith the said shaft. Thebushing is heldlongitudinalflyupon the shaft 24 by the cap 29 secured vtothe end of the stationarybearing 21. When the bushing `becomes Worn, it may be re- ;placed by `withdrawing :the cap 129.

' journalle'd'by'ball'bearings.31 upon the outer portion of the, stationary bearing 21 Within which the shaft '24 is j ournalled. The outer, n end 32: ofi the--belt pulley 30;,provides11a Ifriction-surface i upon ,vvhich ae disc of; leathen 33 1 isi pressed by al 'cap lplate l34 sleevedv .upon :the .end3-5 .o'f the Yshaft 24vvithvcapacitylfor long-itudinal adj ustmentfthereof,.such adjustment vbeing y,permittedby a spline connection 36.

A spring 37. arranged betvveenfthegcapgill and the end plate 32 foffthepulley itends ato :reduce the friction-al vcontact ,between the leather disc 33 and the end plate of thepulley y:30,"fand .38 is a -manually adjustablejmut any other devices of thatcharacter, capable..

screwed upon the end -39 ofthe `shaft, eXtenbelt Wheel and pulley being such that the As thediameterjof thepaper rollzincreasesj ,the speed` offrevolution' of theiimandrelggreatlydecreases and -aszthedriving.pulley.'.zilhas -a constant speed,athe diiferenceinfspeedlof:-

the mandrel isy compensated-for bythe slip'in the friction clutch before; referred tto.

Referring novv to' the means 'forbapplying theztension upon the paper Web 4as-i'tfisfin vthe .zact ofbeingvvoundinthe roll .fform upon the.

mandrel f42risaspressure. cylinder preferably foffmetal.: and extends parallelztosthe mandrel l:13; `and .is rfree 'to -svvingito .and ffrom @said mandrel, 4so pas VVA.to apply pressure upon .the -perimeterof Ithe paper 1101143 being` Wound upon thecore 13a through Which-fthe mandrel eX-tends"(=Fig.;3).

"In `this construction fthe pressure ,cylinder -42 is :hung Ainftvvo independently movable :swinging armsV 45 whereby :the ends fof the cylinder may move independently, xbutfthe vcylinder ras' alvvholebeing bodily movable to .and fromffthemandrel.

The-.ends offthe cylinder 42-arejournalled .at 4.4L in'svvinging armsi rWhose..1cjpper'ends f maximum revolutions fof fthe mandrel 'f per i100 l minute Y are:slightlyinz excess ofthat necessary -to vvind'thefpaper'vvebfasit leaves .the perforating l.and :slitting cutters :and :so thatV f there is a slightfrelease :in theffriction 'drive between the'cap 34-'and'rthe-'end-plate ofthe... pul1ey30- are loosely journalled at 46 upon the transverse guide shaft 12 over which the paper' web 6 is guided. The lower ends of the swinging arms 45 are connected with springs f 47 whose tension may be manually adjusted by means of a screw 48 and adjustable nuts 49,

so that the desired pressure of the cylinder 42 upon the perimeter of the paper roll may be secured. i

50 are adjustable stops which limit Vthe movement of the swinging arms 45 in a direction towards the mandrel and by means of these stops, the pressure cylinder 42 may be held slightly away from the core 13a upon the mandrel. rlhe object of such adjustment is to enable the paper web to be quickly and i easily attached into winding relation with the will now be understood: Referring to 8 and assuming that the pressure of the cylinder 42 has just come into full'play upon the perimeter of the paper roll 43, the tightening` action of this cylinder upon the paper web being wound is due to the fact that it puts a drag upon the incoming web at point 51a, causing a binding upon the instant wound web layer of the roll so that the said layer at the point 51a is tightly clamped and holds back the incoming web thereat, which insures a direct and positive pull by the mandrel 13 circumferentiallj-,f and. inwardly in the direction of theV arrow (Fig. 3) upon said outer layer, with the result that said pull back to the functional binding pointy of contact 51a between the cylinder y42 and the paper roll. The frictional contact at point 51a causes a strong drag upon the outer layer of the paper roll while the mandrel 13 internally winds the web and stretches it between the binding points 51 and 51a, the latter being the contact of the paper web of the roll with the cylinder 42. This stretching by the mandrel is rapidly done in the direction of the arrow awayk from point 51a and which acts to tighten said layer. stretching and tightening due te the' pre-sence of the cylinder 42 is largely confined to that portion of the paper web immediately after leaving the point of application of pressure by the cylinder 42 upon the paper roll. This tightening takes place, as a matter of fact, by increments and being confined at any ment te a small length of the web, its action is most effective and uniform throughout the a given output than In this manner, the

wholewinding operationl It is to be understoodthatas the paper roll increasesin diameter, the springs47 automatically insure! greater tensionupon the pressure cylinder 42, and this is vdesirable since the increase in" diameter of the toilet roll provides a greater length of web between the points 51 and 51a; and there is a corresponding increase of pressure and speed of rotation of the pressure cylinder 42 required and provided.Y v I From the foregoing, it: will beiseen thatiinstead of the mandrel Vor windingbar resting upon and' between rotating cylinders .and-

frictionally driven therefrom .bythe-paper @rolls formed on the bar'resting in frictional? 'p 'contact with the cylinders as has been heretofore customary, I provide a definitelypositioned winding. mandrel or bar 13 which is` positively rotated in a yieldingimannervunder the retarding action of the paper web which' is fed to it at a predetermined speedof .ap-

proximately 1400 feet per minute; and wherein thespeed of rotation-,of the mandrel is gradually reduced as the diameter of the roll increases, said decrease being compensated" for by the yielding character ofthe frictional drive. Y

The said construction embodied in my improvements permits a highl speed operation of the Winder, and moreover, the adjustable support of thepressure cylinderagainst the paper roll facilitates itsrotationand at'the same time insures the tightening of the web during the actv of winding. `The result of these improvements enables a slittingend 'winding machine, modified by the substtution of my roll winder mechanism in place of the former means above referred toyto produce not only tightly wound rolls but 1ncreases the capacity of the machine approximately `500% and therefore the necessity of only '1/5 the number of machines to insure has heretofore been re- I have described my improved method and means in that particularity which Ideem to be .th'efbest exposition of my invention, and

that which I prefer in commercial practice, but I do not restrict or confine myself to' the miner or secondary details, as such are suscep uible of modification, which may be resorted to as a matter of mechanical skill and without a departure from the spirit of the invention.

lI claim: y

l. In a roll winding machine, means for winding a paper web upon a mandrel into roll form, combinedwith said mandrel, means to rotate the mandrel, paper tightening Vmeans comprising a pressure cylinder having an axis parallel to the mandrel and yield- Hingly pressed into frictional contact with .the paper roll being formed on the mandrel, means for guiding the paper web to that lportion of the mandrel and paper roll being iio - tformed -ther-eon' which is'rotating.y away Afrom theipressure cylinder,- andmeansxfor initially .holding the 4pressure cylinder :a slight fdis- "tanee'awayifrom'the :mandrel and the core thereon when present to ppermit thev paper Web to 4fbewound uponfthe lmandrel land core 'for afewxturns before `theweb contacts .with

fthe: pressure` cylinder.

In'a'roll windingmaohine, means for tightly winding a paper webupon' afmand-rel 11n ro'll form, comprising said mandrel 1n n combination 4with means to rotate themanthe Ymandrel.

drel, paper tightening means including a ,pressure cylinderlhaving an'aXis'paralle1 to thef-mandrel and yieldingly pressedinto friotional Contact with the paper roll being I`formed Von the mandrel', means 4for guiding the paper web to that portion of the mandrel and paper roll being formed thereon Awhich -is'rotating away from the pressure cylinder, and `vthe pressure cylinder being Ahungrin two independently v'movable swinging arms wherebyv theendsuof the cylinder may move independently, and the cylinder asa wholelbeing movable bodily to and from 3. In a roll winding machine, meansfor tightly Winding a paper web uponv a mandrel inrollfform,` comprising said mandrelin eo1n- .ibination'with means'to rotate the mandrel, za paperftightening means including a pressure cylinder -havingf an` aXis parallel Ato ,the `mandrel' and yeldingly 4pressed into vfrie- -4tional Contact with the paperroll being @formed :on the mandrel, means vforiguiding -thepaper lweb to that portionvof themandrel and paper roll being formed thereon which is rotating away from-the pressure `cylinder7 andfmeans for'initially holdingthe pressure cylinder at a sufficient distanee away from themandrel to permit thepaperweb Ato be ywound upon themandrelffor a. few

turns before v.the router layer fof the paper roll contacts with the pressure cylinder.

In testimony-.of `which invention, I "hereunto -set my hand.

PHILIP D. PARSONS. 

